Credit: Video Still

Aviva Drescher wasn't kidding when she called her dad's stint on The Real Housewives of New York Season 5 "wildly inappropriate." In this sneak peek of Season 5, Episode 9: "Dirty Ol' Dad," he shamelessly hits on Sonja Morgan (including discussing why he grabbed her butt the night before) and then flirts outrageously with Ramona Singer.

One thing's for certain: Dear old dad is a great addition to the show.

Credit: Bravo Photo: Aviva's Dad Grabs Sonja's Butt, Flirts With Ramona (VIDEO)

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The Real Housewives of New York airs Mondays at 9 p.m. ET/PT on Bravo.